Inter-plot interference and nearest-neighbour analysis of field experiments

A - Papers appearing in refereed journals

Ainsley, A. E., Dyke, G. V. and Jenkyn, J. F. 1995. Inter-plot interference and nearest-neighbour analysis of field experiments. The Journal of Agricultural Science. 125 (1), pp. 1-9.

AuthorsAinsley, A. E., Dyke, G. V. and Jenkyn, J. F.

Results obtained from the plots of a field experiment may be subject to’ representational errors'; that is, they may not exactly reproduce the results that would be expected if the same treatments were applied to whole fields. In particular, the treatment applied to one particular plot often has the potential to affect the adjacent plots; such an effect may be positive or negative according to circumstances, and its magnitude cannot easily be estimated. This paper shows, on theoretical grounds and by simulations, that nearest-neighbour (NN) analysis cannot be relied upon to mitigate the effects of such inter-plot interference, even when the residual variance of the NN analysis is substantially, and by normal criteria significantly, smaller than that of conventional (randomized block) analysis. In certain circumstances, NN analysis of data affected by interference produces greater average bias in estimated treatment differences than conventional analysis.

Year of Publication1995
JournalThe Journal of Agricultural Science
Journal citation125 (1), pp. 1-9
Digital Object Identifier (DOI)
Open accessPublished as non-open access
Funder project or code204
Output statusPublished
Publication dates
Print01 Aug 1995
Copyright licensePublisher copyright
PublisherCambridge University Press (CUP)

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